D君 写道:您老以后还是多图点防晒吧
别过分依赖那些不可信的衣物数字
According to the Skin Cancer Foundation,
"Clothing is the single most effective form of sun protection. It is our first line of defense against the sun’s harmful ultraviolet rays.
Nearly 3.7 million skin cancers are diagnosed in the US annually, and the vast majority of them are caused by solar UV radiation (UVR). UVR also causes up to 90 percent of the visible changes commonly attributed to aging, such as wrinkles, brown spots, and sagging skin. Fortunately, clothing can absorb or block much of this radiation.
Kwik*Sew 3808
If you're particularly sensitive to the sun's damaging UV rays, then all of our SunScreen, SunBlocker, SolarWeave fabric, SolarKnit, Solar Twill, Burlington MCS Blacker fabrics and the other sun blocking fabrics here can help protect your health.
Even if you're not especially sensitive, having a sun blocking shirt, skirt or pants for a day out on the water or at the beach is a good idea.
All of these fabrics block at least 97% of the sun's UVA and UVB rays. We offer these sun protective UPF rated fabrics either by the yard or by the roll.
UPF
What is it ?
UPF stand for Ultraviolet Protection Factor. Clothing can protect you from the sun's ultraviolet rays. It all depends on the fiber content, weave, weight of fabric and color.
So what's the difference between UPF and SPF?
SPF stands for the Sun Protection Factor, most commonly associated with sunscreen. This measures the amount of time it takes for skin to burn.
UPF on the other hand stands for Ultraviolet Protection Factor, which is a measure of the amount of UV radiation that penetrates a fabric and reaches your skin. For example, a fabric rated with a UPF of 20 will allow only 1/20th of the sun's UV rays to pass through.
Marmot UPF fabrics come in UPF 20, 25, 30, 35, 45 & 50.
What are the benefits of this technology?
Wearing a UPF fabric would greatly reduce your exposure to UV rays, (where it covers your body).
Dark colors and tight weaves will have higher UPF ratings. As well, nylons and polyesters are better than plain cotton because they reflect radiation.